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Overall survival (OS) classification and regression tree analysis of colorectal cancer patients from the Czech Republic. Numbers under each node indicate the total number of cases in the subcategory/number of events and percentage of patients with five-year OS. Terminal nodes are bordered in bold, and the corresponding Kaplan–Meier curves are shown underneath. (A) Terminal node CZ1; (B) Terminal node CZ2; (C) Terminal node CZ3; (D) Terminal node CZ4.
